Are ligand exchange reactions one-way reactions or reversible? I know this is a very silly question but its not said outright in any place...
For example, in my high school chemistry book, these two ligand exchange reactions are shown:
$$\ce{[Cu(H2O)6]^{2+} (aq) + 4Cl- (aq) <=> [CuCl_4]^{2-} (aq) + 6H2O (l)}$$
$$\ce{[Cu(H2O)6]^{2+} (aq) + 4NH3 (aq)-> [Cu(NH3)4(H2O)2]^{2+} (aq) + 4H2O (l)}$$
The first is reversible but the second is one-way
Also, my teacher stated that ligand exchange reactions are irreversible... this confused me further
Can someone please tell me what is right...